diredesire
Adjunct Moderator
Why solve half an equation out of context, then insert it back into another formula, this doesn't prove anything?
12 + 5 + 13 / 8 + 5 * 12
x = 5+13
x = 18
12 + x / 8 + 5 * 12
... hmmm....
48÷2(9+3) = ??
- Thread starter accidental
- Start date
Why solve half an equation out of context, then insert it back into another formula, this doesn't prove anything?
12 + 5 + 13 / 8 + 5 * 12
x = 5+13
x = 18
12 + x / 8 + 5 * 12
... hmmm....
aceX
Hall of Fame
Why solve half an equation out of context, then insert it back into another formula, this doesn't prove anything?
12 + 5 + 13 / 8 + 5 * 12
x = 5+13
x = 18
12 + x / 8 + 5 * 12
... hmmm....
It's quite common in university mathematics to solve parts of equations 'out of context'. I guess I've been out of school too long ^_^
Thanks,
aceX
Jaewonnie
Professional
unfortunately, it did for my casio fx-300
After Excel, Mathematica/Maple, Matlab, Python, TI-83, Google Calc, a Mathematician, a math Teacher, and every other math major here except breakpoint(who invented his own random rule) has said 288.
At some point you would think the computer programs and the people with actual, real credentials would be listened to.
And no taking a couple calc classes in college doesn't count.
At some point you would think the computer programs and the people with actual, real credentials would be listened to.
And no taking a couple calc classes in college doesn't count.
Photoshop
Professional
Calculators and programming languages are not references for math expressions. Neither Matlab nor Maple handle the implicit multiplication (Maple returns 24 and ignores the rest).
If you search Google you'll notice a funny thing -- discussions about this particular order of operations "ambiguity" crop up regularly over the years.
There are mathematicians in this thread?
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BobFL
Hall of Fame
Photoshop
Professional
hei guyz am i doing this rite??Do you have the slightest idea what you are talking about?
accidental
Hall of Fame
BobFL
Hall of Fame
F-T-S
Rookie
I ate just one Lay's potato chip. Anything is possible.
tennisnoob3
Professional
i highly doubt that. did you go to standford too? :roll:
aceX
Hall of Fame
Do you have the slightest idea what you are talking about?
Yup, do you need me to explain what I did?
Leelord337
Hall of Fame
48÷2(9+3) = using PEMDAS
parentheses: 9+3= 12... then multiply so thats 2x12 = 24, then divide 48/24 thats 2
parentheses: 9+3= 12... then multiply so thats 2x12 = 24, then divide 48/24 thats 2
dr325i
G.O.A.T.
FAIL...
Unbelievable how many College grads (or near to be the grad) do not know the 3rd grade math...
Sad, but true in our society...
dr325i
G.O.A.T.
WHY Multiply first???
Multiply has no priority over division...
Parentheses first.
48/2(9+3) = 48 / 2 * 12 = (left to right) 24 * 12 = 288
End of the story...
dr325i
G.O.A.T.
Please do so, so you can understand that it makes NO sense
Why didn't you assign x=48/2???
You are changing the meaning of the original statement...
OHAI
Rookie
Because if you are taught PEMDAS
Parenthesis
Exponents
MULTIPLICATION
division (notice how it comes after multiplication)
Addition
Subtraction
I'm no longer saying it's the correct way but that's the reason WHY.
MegacedU
Professional
The only FAIL here is you, because you're so damn upset over an internet forum. I didn't go to college, so fail x 10.
aceX
Hall of Fame
In elementary mathematics, a term is either a single number or variable, or the product of several numbers or variables separated from another term by a + or - sign in an overall expression. For example, in
3 + 4x + 5yzw
3, 4x, and 5yzw are all terms.
dr325i
G.O.A.T.
YOU are taught WRONG.
Multiplication has NO priority over division, same for addition/subtraction.
However, multiplication and division have priority over the addition and subtraction.
Parenthesis first.
You do not understand what they taught you or they did it wrong.
Believe me, I learned where math was invented.
This is a 8-year-old math people!
dr325i
G.O.A.T.
what??????
MegacedU
Professional
Don't you guys have some Love Parade where you are? Sounds hypocritical to me!
dr325i
G.O.A.T.
Obviously you did not do anything with psychology...
How did you get the idea that I am "SO DAMN UPSET"???
I am drinking my morning coffee and replying to people (like you) that do not know the basics...
You should be the one upset, talking on the tennis forum instead of "learning to walk"...
BobFL
Hall of Fame
Yes but do not explain what you did. Explain why you did it. Put it in context with a given equation.
dr325i
G.O.A.T.
dr325i
G.O.A.T.
BRAVO, this ends the thread...
OHAI
Rookie
You're not understanding. An OPEN minded person wouldn't close people off because they were wrong but instead explain to them why they were wrong so in the future they wouldn't make the same mistake. But instead you're being a ****** and calling everyone retards because they were taught incorrectly.
MegacedU
Professional
Because of you, I will skip the Czech Republic on my tour of Europe.
dr325i
G.O.A.T.
So, you are going to College...
Law degree...wow, impressive, how did you pass the LSAT "games" section, it does include the basic math (from someone who scored 169 in 2003)
dr325i
G.O.A.T.
I am an American, so skip the US, too
And stay away from the Law because your logic is....blah...
MegacedU
Professional
I don't remember anyone asking you.
dr325i
G.O.A.T.
Sorry if I left that impression however, I never called anyone a ****** in this thread...
I called it a failed math education rather than a retardation...
I do hope, though, that you learned something from this thread.
BreakPoint
Bionic Poster
The format used to program a computer to solve equations is not the same as writing out the equation in a format to be solved by hand.The by hand rules are the same as computer rules...
BTW, if the 12 was supposed to be in the numerator, the equation would have been written:
48(9+3)÷2 or 48(9+3)/2
The fact that the equation was written:
48÷2(9+3) which is the same as 48/2(9+3) means that the (9+3) or (12) is in the denominator.
Numbers or variables to the left of the / are in the numerator and numbers or variables to the right of the / are in the denominator. Why? Because using the forward slash / symbol is how people type out the divide by line using a keyboard because they can't easily type out a horizontal line and put numbers and variables above the line for the numerator and numbers and variables below the line for the denominator. Thus, the / sign is used for convenience, with the numerator to the left of the / and the denominator to the right of the /.
dr325i
G.O.A.T.
I am asking you, instead...
BobFL
Hall of Fame
OHAI
Rookie
I'm curious to why you chose to use blue for eight and red for two?
Is this to throw people off?
Are people more inclined to choose red over blue?
BreakPoint
Bionic Poster
And if you want the 12 in the numerator, the equation would have been written this way:
48(9+3)/2 or 48(12)/2
The 12 would have been to the left of the /. But since the 12 is to the right of the /, it's in the denominator. That's why the equation was written as: 48/2(9+3) and NOT 48(9+3)/2
Photoshop
Professional
I'm curious to why you chose to use blue for eight and red for two?
Is this to throw people off?
Are people more inclined to choose red over blue?
This should help people pick the right answer.
aceX
Hall of Fame
Good to see some people stop and think rather than blindly following rules they learned in school.
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